加载时圆形进度条的动画

Question

任何人都可以帮助我如何在加载页面后开始为圆形进度条边框设置动画，我需要所有百分比的动画...请向我提供任何帮助...如果有任何帮助我非常感谢问题。

请给出一个参考，这个例子如何在加载时启动动画

我需要类似于click here的动画

.progress-circle {
   font-size: 20px;
   margin: 20px;
   position: relative; /* so that children can be absolutely positioned */
   padding: 0;
   width: 5em;
   height: 5em;
   background-color: #F2E9E1; 
   border-radius: 50%;
   line-height: 5em;
}

.progress-circle:after{
    border: none;
    position: absolute;
    top: 0.35em;
    left: 0.35em;
    text-align: center;
    display: block;
    border-radius: 50%;
    width: 4.3em;
    height: 4.3em;
    background-color: white;
    content: " ";
}
/* Text inside the control */
.progress-circle span {
    position: absolute;
    line-height: 5em;
    width: 5em;
    text-align: center;
    display: block;
    color: #53777A;
    z-index: 2;
}
.left-half-clipper { 
   /* a round circle */
   border-radius: 50%;
   width: 5em;
   height: 5em;
   position: absolute; /* needed for clipping */
   clip: rect(0, 5em, 5em, 2.5em); /* clips the whole left half*/ 
}
/* when p>50, don't clip left half*/
.progress-circle.over50 .left-half-clipper {
   clip: rect(auto,auto,auto,auto);
}
.value-bar {
   /*This is an overlayed square, that is made round with the border radius,
   then it is cut to display only the left half, then rotated clockwise
   to escape the outer clipping path.*/ 
   position: absolute; /*needed for clipping*/
   clip: rect(0, 2.5em, 5em, 0);
   width: 5em;
   height: 5em;
   border-radius: 50%;
   border: 0.45em solid #53777A; /*The border is 0.35 but making it larger removes visual artifacts */
   /*background-color: #4D642D;*/ /* for debug */
   box-sizing: border-box;
  
}
/* Progress bar filling the whole right half for values above 50% */
.progress-circle.over50 .first50-bar {
   /*Progress bar for the first 50%, filling the whole right half*/
   position: absolute; /*needed for clipping*/
   clip: rect(0, 5em, 5em, 2.5em);
   background-color: #53777A;
   border-radius: 50%;
   width: 5em;
   height: 5em;
}
.progress-circle:not(.over50) .first50-bar{ display: none; }


/* Progress bar rotation position */
.progress-circle.p0 .value-bar { display: none; }
.progress-circle.p1 .value-bar { transform: rotate(4deg); }
.progress-circle.p2 .value-bar { transform: rotate(7deg); }
.progress-circle.p3 .value-bar { transform: rotate(11deg); }
.progress-circle.p4 .value-bar { transform: rotate(14deg); }
.progress-circle.p5 .value-bar { transform: rotate(18deg); }
.progress-circle.p6 .value-bar { transform: rotate(22deg); }
.progress-circle.p7 .value-bar { transform: rotate(25deg); }
.progress-circle.p8 .value-bar { transform: rotate(29deg); }
.progress-circle.p9 .value-bar { transform: rotate(32deg); }
.progress-circle.p10 .value-bar { transform: rotate(36deg); }
.progress-circle.p11 .value-bar { transform: rotate(40deg); }
.progress-circle.p12 .value-bar { transform: rotate(43deg); }
.progress-circle.p13 .value-bar { transform: rotate(47deg); }
.progress-circle.p14 .value-bar { transform: rotate(50deg); }
.progress-circle.p15 .value-bar { transform: rotate(54deg); }
.progress-circle.p16 .value-bar { transform: rotate(58deg); }
.progress-circle.p17 .value-bar { transform: rotate(61deg); }
.progress-circle.p18 .value-bar { transform: rotate(65deg); }
.progress-circle.p19 .value-bar { transform: rotate(68deg); }
.progress-circle.p20 .value-bar { transform: rotate(72deg); }
.progress-circle.p21 .value-bar { transform: rotate(76deg); }
.progress-circle.p22 .value-bar { transform: rotate(79deg); }
.progress-circle.p23 .value-bar { transform: rotate(83deg); }
.progress-circle.p24 .value-bar { transform: rotate(86deg); }
.progress-circle.p25 .value-bar { transform: rotate(90deg); }
.progress-circle.p26 .value-bar { transform: rotate(94deg); }
.progress-circle.p27 .value-bar { transform: rotate(97deg); }
.progress-circle.p28 .value-bar { transform: rotate(101deg); }
.progress-circle.p29 .value-bar { transform: rotate(104deg); }
.progress-circle.p30 .value-bar { transform: rotate(108deg); }
.progress-circle.p31 .value-bar { transform: rotate(112deg); }
.progress-circle.p32 .value-bar { transform: rotate(115deg); }
.progress-circle.p33 .value-bar { transform: rotate(119deg); }
.progress-circle.p34 .value-bar { transform: rotate(122deg); }
.progress-circle.p35 .value-bar { transform: rotate(126deg); }
.progress-circle.p36 .value-bar { transform: rotate(130deg); }
.progress-circle.p37 .value-bar { transform: rotate(133deg); }
.progress-circle.p38 .value-bar { transform: rotate(137deg); }
.progress-circle.p39 .value-bar { transform: rotate(140deg); }
.progress-circle.p40 .value-bar { transform: rotate(144deg); }
.progress-circle.p41 .value-bar { transform: rotate(148deg); }
.progress-circle.p42 .value-bar { transform: rotate(151deg); }
.progress-circle.p43 .value-bar { transform: rotate(155deg); }
.progress-circle.p44 .value-bar { transform: rotate(158deg); }
.progress-circle.p45 .value-bar { transform: rotate(162deg); }
.progress-circle.p46 .value-bar { transform: rotate(166deg); }
.progress-circle.p47 .value-bar { transform: rotate(169deg); }
.progress-circle.p48 .value-bar { transform: rotate(173deg); }
.progress-circle.p49 .value-bar { transform: rotate(176deg); }
.progress-circle.p50 .value-bar { transform: rotate(180deg); }
.progress-circle.p51 .value-bar { transform: rotate(184deg); }
.progress-circle.p52 .value-bar { transform: rotate(187deg); }
.progress-circle.p53 .value-bar { transform: rotate(191deg); }
.progress-circle.p54 .value-bar { transform: rotate(194deg); }
.progress-circle.p55 .value-bar { transform: rotate(198deg); }
.progress-circle.p56 .value-bar { transform: rotate(202deg); }
.progress-circle.p57 .value-bar { transform: rotate(205deg); }
.progress-circle.p58 .value-bar { transform: rotate(209deg); }
.progress-circle.p59 .value-bar { transform: rotate(212deg); }
.progress-circle.p60 .value-bar { transform: rotate(216deg); }
.progress-circle.p61 .value-bar { transform: rotate(220deg); }
.progress-circle.p62 .value-bar { transform: rotate(223deg); }
.progress-circle.p63 .value-bar { transform: rotate(227deg); }
.progress-circle.p64 .value-bar { transform: rotate(230deg); }
.progress-circle.p65 .value-bar { transform: rotate(234deg); }
.progress-circle.p66 .value-bar { transform: rotate(238deg); }
.progress-circle.p67 .value-bar { transform: rotate(241deg); }
.progress-circle.p68 .value-bar { transform: rotate(245deg); }
.progress-circle.p69 .value-bar { transform: rotate(248deg); }
.progress-circle.p70 .value-bar { transform: rotate(252deg); }
.progress-circle.p71 .value-bar { transform: rotate(256deg); }
.progress-circle.p72 .value-bar { transform: rotate(259deg); }
.progress-circle.p73 .value-bar { transform: rotate(263deg); }
.progress-circle.p74 .value-bar { transform: rotate(266deg); }
.progress-circle.p75 .value-bar { transform: rotate(270deg); }
.progress-circle.p76 .value-bar { transform: rotate(274deg); }
.progress-circle.p77 .value-bar { transform: rotate(277deg); }
.progress-circle.p78 .value-bar { transform: rotate(281deg); }
.progress-circle.p79 .value-bar { transform: rotate(284deg); }
.progress-circle.p80 .value-bar { transform: rotate(288deg); }
.progress-circle.p81 .value-bar { transform: rotate(292deg); }
.progress-circle.p82 .value-bar { transform: rotate(295deg); }
.progress-circle.p83 .value-bar { transform: rotate(299deg); }
.progress-circle.p84 .value-bar { transform: rotate(302deg); }
.progress-circle.p85 .value-bar { transform: rotate(306deg); }
.progress-circle.p86 .value-bar { transform: rotate(310deg); }
.progress-circle.p87 .value-bar { transform: rotate(313deg); }
.progress-circle.p88 .value-bar { transform: rotate(317deg); }
.progress-circle.p89 .value-bar { transform: rotate(320deg); }
.progress-circle.p90 .value-bar { transform: rotate(324deg); }
.progress-circle.p91 .value-bar { transform: rotate(328deg); }
.progress-circle.p92 .value-bar { transform: rotate(331deg); }
.progress-circle.p93 .value-bar { transform: rotate(335deg); }
.progress-circle.p94 .value-bar { transform: rotate(338deg); }
.progress-circle.p95 .value-bar { transform: rotate(342deg); }
.progress-circle.p96 .value-bar { transform: rotate(346deg); }
.progress-circle.p97 .value-bar { transform: rotate(349deg); }
.progress-circle.p98 .value-bar { transform: rotate(353deg); }
.progress-circle.p99 .value-bar { transform: rotate(356deg); }
.progress-circle.p100 .value-bar { transform: rotate(360deg); }
.progres-circle{
    animation: loading-2 1.5s linear forwards 1.8s;
}
@keyframes loading-1{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
}
@keyframes loading-2{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(144deg);
        transform: rotate(144deg);
    }
}
@keyframes loading-3{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
}
@keyframes loading-4{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(36deg);
        transform: rotate(36deg);
    }
}
@keyframes loading-5{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(126deg);
        transform: rotate(126deg);
    }
}
@media only screen and (max-width: 990px){
    .progress-circle{ margin-bottom: 20px; }
}

<div class="progress-circle p10">
   <span>10%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle p33">
   <span>33%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p66">
   <span>66%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p77">
   <span>77%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p99">
   <span>99%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p100">
   <span>100%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>

Answer 1

所以如果你隐藏黑色百分比圆，你会看到他们使用 CSS 创建了两个带边框的半圆，并根据百分比值旋转它们：

这是他们的半圆形边框代码：

.progress-bar {
    animation: loading-2 1.5s linear forwards 1.8s;
    border-color: #049dff;
    border-top-right-radius: 80px;
    border-bottom-right-radius: 80px;
    border-left: 0;
    transform-origin: center left;
}

请注意，他们使用animation-fill-mode: forwards 来确保动画保持在其结束的位置。